Different thermal preferences for brooding and larval dispersal of two neighboring shrimps in deep-sea hydrothermal vent fields

Hiromi Watanabe, Takuya Yahagi, Yukiko Nagai, Mi Hye Seo, Shigeaki Kojima, Junichiro Ishibashi, Hiroyuki Yamamoto, Katsunori Fujikura, Satoshi Mitarai, Takashi Toyofuku

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2 Citations (Scopus)

Abstract

Temperature is an important factor affecting the distributions and life-history traits of marine animals. Deep-sea hydrothermal vents are suitable environments to examine ecologic differences related to temperature, due to the steep temperature gradients around the vents. Rearing experiments under various temperature conditions (5–30 °C) at atmospheric pressure demonstrated a difference in thermal effects on egg hatching and larva in two co-occurring, vent-associated alvinocaridid shrimps – the peripherally distributed Alvinocaris longirostris and the centrally distributed Shinkaicaris leurokolos. The duration before hatching became shorter as temperature increased, while the maximum hatching rate occurred at higher temperatures in S. leurokolos (10–20 °C) than in A. longirostris (10 °C). Hatched larvae of both species were negatively buoyant, and larva with normal abdominal length could actively swim and stay suspended in the mid- or surface water layers of the culture plates under our experimental conditions. However, no larvae settled or metamorphosed into juveniles under the rearing conditions used in this study. Larvae with shortened abdomens occurred under most of the experimental conditions, although they were less frequent at 10 °C in A. longirostris and 20 °C in S. leurokolos. The maximum survival periods at these temperatures were 88 days in A. longirostris and 30 days in S. leurokolos. These characteristics may cause differences in the distributional ranges of the two species. The present results indicate that temperature is an important factor controlling life-history traits of vent shrimps.

Original languageEnglish
Pages (from-to)1282-1289
Number of pages8
JournalMarine Ecology
Volume37
Issue number6
DOIs
Publication statusPublished - Dec 1 2016

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science
  • Ecology

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    Watanabe, H., Yahagi, T., Nagai, Y., Seo, M. H., Kojima, S., Ishibashi, J., Yamamoto, H., Fujikura, K., Mitarai, S., & Toyofuku, T. (2016). Different thermal preferences for brooding and larval dispersal of two neighboring shrimps in deep-sea hydrothermal vent fields. Marine Ecology, 37(6), 1282-1289. https://doi.org/10.1111/maec.12318